Oil filter



Nov. 14, 1939. c. E. FRUDDEN oIL FILTER Filed Aug. 22, 1936 Patented Nov. 14, 1939 UNITED sTATEs PATENT OFFICE 2.17am on. mm

Application August faz; 193s. serial No. 97.337

s claims. (Cl. 21o-131) This invention pertains to lters and is especially directed to nil filters.

An object of this invention is to provide a filter of greatly simplified and rugged construction in which the number. of parts is reduced to a minimum.

Another object of this' invention is to provide .a iilter comprising an easily replaceable cartridge.

Another' object of this invention is to provide a filter cartridge with a removable mass of ltering material, so that the same container may be used repeatedly.-

Other objects will appear from the appended specication and claims.

The invention comprises a simplified filter having a minimum number of parts and having an easily accessible and quickly removable cartridge containing the filtering material. Either the Til` tering material may be removable, so that when one mass of material has become saturated with impuriti it can easily be replaced by another mass within the same cartridge container; or the mass of filtering material may bepermanently attached to the interior of the cartridge container by a suitable adhesive, and when a change is 4necessary the entire cartridge, including the 4container, may be replaced by another cartridge. The cartridge comprises a simple container substantially lled with a homogeneous iilteringmaterial, without the comparatively complicated features thought to be necessary in the prior art. The cartridge may be mounted with its closed end up; or it may be mounted with its closed end down,v in which case itacts both as filter and sediment trap.

` The drawing shows s'peciiic examples of ill structure embodying this invention. Y

Fig. 1 is a diagrammatic showing of the filter connected. in an internal combustion' engine lu-v bricatingA circuit.

Fig. 2 is a vertical sectional view'of one modi 'cation of the invention.' Fig. 3 is avertical sectional view of another modied form of the invention.

Fig. 4 is a. vertical sectional-,view ofa replace- A filter cartridge I5, which maybe of metal or,

4is connected in the oi1 circuit. Y

indicated bythe arrows fromthe sump B. It Y will be noted that the lter is in parallel with Athreaded cylindrical portion I2 and inlet and outlet ports v43 and Il, respectively. A boss I3' surrounds the innerend of central inlet port I3.

as shown, an ordinary fruit jar,`i`s mounted with its open end adjacent to the base and communieating with the outlet port I4, AThe container .or receptacle I5 maybe attached to the base by any desired means as by screwing itsthreaded neck I6 on the threaded base portion I2. A gasket I1 is located between the edge of base II and .a flange on the container neck to provide an oil tight connection therein. While a threaded connection is shown, itis clear that any other desired manner of removably fastening the container` on the base maybe utilized. For example,'the container may be retained by a wire bail 24 pivoted on the base and adapted to be swung up over the bottom of the receptacle, to press it toward the base 0r the container may be bolted to the bas'e by any suitable. arrangement of bolts, as is obvious? Mounted within the boss I3' and communieating with port I3 is a tube I8'having a plurality of openings I9 at its free end. The tube may be retained in place by soldering, welding or being threaded onthe base. but a simple press fit is preferred. It should be notedthat the tube I8 extends practically the entire lengthj of thev container I5, to discharge the oil to be'ltered at vor near the closed end ofthe container.

The receptacle 5 isiilled vwith tightly packed i filtering material 22. Any known ltering materlal may be used but wool, or cotton waste is referred. `The filtering material is retained in he jar by a perforated retaining. disk 2li, which lis loosely mounted on tube I8, and held in place between boss I3' and ilteringmaterial 22.

'Ihe method of operation is Aclear from the above description. Oilenters under pressure.

'through inlet port I3 and is carried by tube I8K to the closed end of the container.

VIt ows from there toward the open end, and isltered in passing through filtering 'material 22. It should be noted that the pressure ofthe oil' tends to compact the materiaLthus closing any open spaces that may have occurred in packing the material. The`oil then flows fromthe outlet port I4 to the engine lor sump depending 'on how the lter When the filtering material becomes clogged, due to the amount of foreign -matter caught in the iilter, it is only necessary to unscrew the 'receptacle l5 with its material, and insert a new one in itsplace. consist simply of a container I5 packed with filtering material 22, with a central aperture 'for the Vtube-| 8. Another method of replacing the filtering material' is to unscrew'the cartridge, remove the Wad of filtering'material from the container, inserta new wad of material, and replace the same container back on the base. In the latter case, a container of uniform internal transverse dimension, such as isv shown in Fig. 3,

vwithout a. reduced neck portion, is used in order to make it easier to remove'the saturated wad of ltering material. 'I'he new package of ltering material 22 should have a central aperture therein, retained-by a temporary` filled stick 23 as shown in Fig. 4 because otherwise it is vpractically impossible to insert the tube I8 ther`e` in. The method of preparingthe wad of f11ter-. ing material is disclosed and claimed in the patent to Bruesewitz \No. 2,078,525, dated April 27, 1937. Y n

IWhile the filter has been shown mounted with .its closed end uppermost, it is clear that it can also be `mounted with' its .closed end down.

When operated in this manner, the filter also acts as a sediment trap, to catch Water and other relatively heavy impurities.

The method of assembling the filter cartridges is very simple.` A glass or metal container l5 may be used, with or without a reduced neck portion. A mandrel `is located centrally of thev ably inserted into the central recess to main` tain its configuration. If the ltering material is intended to remain in the container permanently it may be retained more firmly if the interior of the container is coated' with a layer ofvarnish before the ltering material is inserted. will act as an adhesive to retain the Awad of cotton waste or other material in place permanently.

It will be seen that the structure disclosed is Vof utmost simplicity and provides a filter cartridge which may be replaced almost instantly. Thecartridge, consisting solely of a container lled with a mass of filtering materiaLis inexpensive to manufacture. The construction pro- `vides a rugged iilter which is especially adapted for rough usage, as in a tractor, for example'. Moreover it can be used as a combined filter and sediment trap.

` Fig. 51showsa modication in-which the cen-'ll trai tubes I8 extend to approximately'the mid- The replacement cartridges dle ofthe cartridge. The oil ows from this point in vboth directions through the filtering material and linto the outlet port throughauxiliary tube 2| which is perforated at both ends. The advantage 'of this modification is' that more oil is filtered for the sainel cross-section of cartridge, 'and that no pressure is exerted on the ends of the container, since the oil atv both ends of the container is at outlet pressure, which is approximately atmospheric pressure.

It is to be understood that this invention is not limited to thespeciiic construction herein disclosed, but is to be construed in accordance with the scope of the appended claims.

It is claimed and desired to secure by Letters Patent: n,

1. A filter comprising a base provided with inlet and outlet ports, one of said ports comprising a substantially straight vimperiorate tube having one end fixed on said base and provided with openings adjacent its other end, a container provided with a packed mass of flbrous filtering 'material having the fibers arranged'at random therein and substantially lling said container and having a preformed aperture formed by selfsupporting Walls of said filtering material" thro-ugh a substantial portion of the length ci said container, and means for removably mount- -mass of fibrous filtering material therein, said mass of filtering material being provided witha preformed self-supporting .recess extending longitudinally thereofv from the open end of said ing the said container with its contents on said container to substantially the closed end thereof, and means for removably mounting said container and its contents on said base so that said tube fills said recess and snugly and directly contacts the walls thereof along substantially the entire length vof said tube. l y

3. A filter comprising a base provided with an limperforate tube iixed on said'base at one end so that said tube fills said recess and snugly and directly contacts the walls thereof, said other end of said tube being imbedded directly in said filtering material, whereby said tube is adapted to discharge iiuid to be iiltered 'l irectly into said filtering material. Y

K" CONRADE. FRUDDEN. 

